The 13th cranial nerve is also known as the nervus terminalis or terminal nerve. It's a highly conserved nerve located just above the olfactory bulbs in humans and most vertebrate species. Its fibers extend from the front of the brain to the olfactory and nasal areas. Contrary to the commonly known twelve cranial nerves, some sources identify a thirteenth.
Understanding the Nervus Terminalis
The nervus terminalis (CN 0) is a somewhat enigmatic nerve. While its presence is well-documented across many vertebrate species, its exact function remains unclear. Research suggests it might play a role in the olfactory system and possibly in other sensory processes. Its discovery and inclusion as a "13th cranial nerve" has led to some debate and controversy in the field of neuroanatomy.
Key Features of the 13th Cranial Nerve:
- Location: Situated above the olfactory bulbs.
- Pathway: Extends from the rostral portion of the brain to the olfactory and nasal epithelia.
- Function: Not entirely understood, potentially related to olfaction and other sensory functions.
- Alternative Names: Nervus terminalis, cranial nerve zero (CN 0).
Further Research and Ongoing Debate
The inclusion of the nervus terminalis as the 13th cranial nerve is not universally accepted. Its function and significance are still areas of ongoing research. The papers linked below provide insight into the ongoing discussions around this nerve:
